[PD] stereo difference?

i go bananas hard.off at gmail.com
Fri Oct 12 11:49:58 CEST 2012


oops, sorry about the double reply Joe, i forgot 'reply to all'

to turn a stereo signal into a mono one, yes it's L+R..but that's not what
i wanted to do.  I wanted to take ONLY the parts of a stereo mix which lie
right in the middle.  It would be basically the inverse of a stereo
difference effect.

To put it another way, Stereo difference removes those parts of the mix
which are panned dead center.  What i want to do is leave those parts, and
then remove anything that isn't panned dead center.

At first, i thought it would be as simple as just subtracting the stereo
difference signal from the original mix.  But when i actually tried it, it
didn't work, and then also when i worked it out logically on paper, i
realized that it's impossible just with simple arithmetic.



My best guess, is that you could FFT the stereo difference signal to get
it's spectral profile, and then subtract that from the original mix.  Might
give it a go some time.
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